Leviticus 16:26-30

²⁶The man who let the scapegoat go free must wash his clothes and bathe his body in water; after that, he may come back into the camp.

²⁷The bull for the sin offering and the goat for the sin offering, whose blood was brought in to make atonement in the holy place, must be carried outside the camp. There they must burn their hides, flesh, and dung.

²⁸The man who burns those parts must wash his clothes and bathe his body in water; after that, he may come back into the camp.

²⁹It will always be a statute for you that in the seventh month, on the tenth day of the month, you must humble yourselves and do no work, whether the native born or a foreigner who is living among you.

³⁰This is because on this day atonement will be made for you, to cleanse you from all your sins so you will be clean before Yahweh.